<!DOCTYPE html>
<html>
	<head>
	<title>ZapaWeb</title>
	</head>
	<body>
		<h1>$S</h1>
		<form action='onoff' method='POST'>
			<label for='a'>$S</label>
			<input type='checkbox' id='a' name='a'><br>
			<label for='b'>$S</label>
			<input type='checkbox' id='b' name='b'><br>
			<label for='c'>$S</label>
			<input type='checkbox' id='c' name='c'><br>
			<label for='d'>$S</label>
			<input type='checkbox' id='d' name='d'><br>
			<input type='submit' value='Cambiar'>
		</form>
		<p>$S</p>
	</body>
</html>
